from django.test import TestCase
import datetime
from django.utils import timezone
from .models import Question


# Create your tests here.

class QuestionModelTests(TestCase):
    """
    python manage.py test polls  会找到 polls。
    在 polls 应用中 找到 tests.py 文件。
    在 tests.py 中 找到 TestCase 的子类。
    在 TestCase 的子类中 找到 test 开头的函数然后运行。我们期望结果 是 false ,使用 断言
    """

    def test_was_published_recently_with_future_question(self):
        """
        was_published_recently() returns False for questions whose pub_date
        is in the future.
        """
        time = timezone.now() + datetime.timedelta(days=30)
        future_question = Question(pub_date=time)
        self.assertIs(future_question.was_published_recently(), False)

    def test_was_published_recently_with_old_question(self):
        """
        was_published_recently() returns False for questions whose pub_date
        is older than 1 day.
        """
        time = timezone.now() - datetime.timedelta(days=1, seconds=1)
        old_question = Question(pub_date=time)
        self.assertIs(old_question.was_published_recently(), False)

    def test_was_published_recently_with_recent_question(self):

        """
        was_published_recently() returns True for questions whose pub_date
        is within the last day.
        """
        time = timezone.now() - datetime.timedelta(hours=23, minutes=59, seconds=59)
        recent_question = Question(pub_date=time)
        self.assertIs(recent_question.was_published_recently(), True)
